With the advancement of technology, advanced medical devices and advanced medical technology are widely used in clinical practice, making the diagnosis and treatment of many complex and difficult joint disorders simple, fast, safe and effective. Arthroscopic technology, fracture internal fixation and artificial joint replacement are known as the three most important advances in the field of orthopedics in the 20th century. Arthroscopy is a rod-shaped optical instrument with a diameter of about 5 mm that is used to observe the internal structure of a joint. The arthroscope is a very small incision hole through which a metal tube with an illuminated lens is inserted into the joint cavity, and the image is magnified on the monitor inside the joint to observe the lesion inside the joint, so it is more accurate than the naked eye observation after the joint is cut. It is a new technology developed in recent years. Arthroscopy has a lens at the end of a thin tube, which is inserted into the joint, and the internal structure of the joint is displayed on the monitor. As a result, the internal structure of the joint can be directly observed. Arthroscopy is not only used for diagnosis of diseases, but has been widely used for treatment of joint diseases. Arthroscopic surgery is a minimally invasive procedure that was first performed on the knee joint, and later on the hip, shoulder, ankle, elbow, and small joints such as the fingers. Arthroscopy is more comprehensive than cutting into the joint because almost all parts of the joint can be seen; it is more accurate than cutting into the joint because the image is magnified; it is less traumatic because of the small incision, less scarring, faster recovery, and fewer complications. The diagnosis of difficult joint diseases and injuries that have plagued patients for years can often achieve immediate results. In addition to the advantages of minimally invasive arthroscopic surgery, there are also the following advantages: fast postoperative recovery, patients can walk on the ground on the first day after surgery; light postoperative pain, most patients do not even need to use painkillers after surgery; fast wound healing, small surgical incisions are completely healed within a week after surgery; postoperative joint dysfunction generally does not occur, because unlike traditional incisional cleaning surgery, there is no incision, and postoperative Because there is no incision, there is almost no possibility of adhesions in the joint after surgery, so dysfunction rarely occurs; side effects of surgery are rare, mainly because there is no need to cut the joint, so the possibility of damaging the blood vessels and nerves around the joint is greatly reduced; complications of surgery are rare, because patients can go to the ground as soon as possible after surgery, and the occurrence of deep vein thrombosis, lung infection, and secondary urinary tract infection caused by prolonged bed rest is basically The procedure will not occur. Arthroscopic surgery is indicated for 1. Knee joint: meniscal injury (pain, restricted movement, locking), cruciate or collateral ligament injury (post-traumatic pain, weak legs, inability to exercise vigorously), knee dislocation and multiple ligament injuries, osteoarthritis (walking pain), diffuse synovitis (swelling, pain, fluid accumulation), rheumatoid arthritis, gouty arthritis, patellar dislocation, osteochondral injury, synovial chondromatosis, synovial crepitus syndrome, pigmented villous nodular synovitis, septic arthritis (redness, swelling, heat, pain, inability to move), intra-articular fracture, N-fossa cyst, knee stiffness. 2.Shoulder joint: recurrent dislocation of shoulder joint (repeated dislocation or instability of shoulder joint), acromion impingement syndrome (pain when lifting the arm to a certain degree), rotator cuff injury (weakness and pain when lifting the arm), SLAP injury (shoulder pain when lifting heavy objects), frozen shoulder (shoulder pain with severe limitation of upper arm movement), calcific tendonitis of rotator cuff (shoulder pain, calcified shadow visible on X-ray), acromioclavicular joint osteoarthritis, acromioclavicular joint dislocation, proximal humerus fracture, shoulder osteoarthritis (shoulder pain, shoulder degeneration on X-ray), septic arthritis, Wang Zimin, Department of Orthopedics, Changhai Hospital, Shanghai 3. 4. Hip joint: early stage of femoral head necrosis with drilling and decompression implantation or tantalum rod implantation + arthroscopic clearance, hip joint free body, hip impingement sign, glenoid labral injury: arthroscopic focal clearance, synovitis, septic arthritis 5. Foot and ankle: anterior ankle impingement syndrome, lateral ankle ligament injury and instability, intra-articular free body of the ankle, Achilles tendon rupture, talar top bone cartilage injury, inferior talar Arthritis, ankle traumatic arthritis arthroscopic perioperative management preparation Before surgery, a general examination is required, no serious diseases of vital organs of the body, no infections such as respiratory tract, and no skin breaks, boils, etc. around the knee joint including the thigh and lower leg. Before the operation, local skin washing should be performed to keep it clean and be fully prepared psychologically. After anesthesia, under the doctor’s guidance, actively carry out functional exercises of the limbs, such as leg muscle contraction exercises, straight leg raising exercises, and walk on the ground only after the muscle strength is restored with the doctor’s permission to avoid spraining the joints or falling down. You should always consult with your doctor for details so that you can get the best treatment and recovery. All patients who have undergone arthroscopic surgery should follow up with their surgeon at 3 months 6 months and 1 year after the surgery. Most procedures take anywhere from 30 minutes to 1 hour and are usually discharged 2 to 3 days after surgery.